Nice phone,low end processor which is good for battery savings,have built in gps and e-compass better than china or clone phone which doesn't have or have fake gps and e-compass which is stated in cpu-z,nice phone and thanks SEMC although is Sony now

Nice phone,low end processor which is good for battery savings,have built in gps and e-compass better than china or clone phone which doesn't have or have fake gps and e-compass which is stated in cpu-z,nice phone and thanks SEMC although is Sony now

Nice phone,low end processor which is good for battery savings,have built in gps and e-compass better than china or clone phone which doesn't have or have fake gps and e-compass which is stated in cpu-z,nice phone and thanks SEMC although is Sony now

Durable and reliable phone. Lags on some apps and low internal storage. Decent performance for its age. Even better after rooting it. Original battery still holds up well surprisingly. No regret on purchase even after 4 years of use.

I own this phone since February 2011. That was 4 years ago and it's still working. It's a good quality phone. It fell out of my pocket and the screen once hit a spiky rock. All it got was a really small dent. Well,it over time it "earned" a really small crack at the upper-left corner close to USB/charger connector and sometimes it has trouble "detecting" the charger, but after hitting the floor so many times, I am surprised it's still working.
Even the battery, the same one I had when I bought the phone still has a pretty good life. It will last 2-4 hours when actively using the phone, depending if it's surfing, playing games or watching videos. When I am not using it a lot, it can easily last for 2 days, sometimes more. For a 4 years old battery it's not bad at all.

X8's performance is not too bad. It can run some older 3D games such as Raging Thunder 2 and Duke Nukem 3D pretty smoothly and can even run NES games with Nesoid almost perfectly, which I loved the most :D.
It can get slow after using multiple apps, so unless you don't mind it, using a task manager to free some RAM is a must. It has trouble opening sites with large contents when using a default browser, so Opera Mini or some other similar browser is recommended.

One of the most disappointing things about this phone is that it doesn't have an update above Android 2.1.
Sony really disappointed me for not making at least Android 2.2 update for this phone. It really needed it for one good reason, its low storage space. You will run out of it pretty quickly, since you can't move apps to SD card. But thanks to some nice people, there are a lot of different custom roms that you can flash and make it into a decent phone and say goodbye to 2.1 Eclair. I really recommend you to do this, you won't regret it,. You will get a lot of good stuff, this includes better performance and even battery life. However, I advise you to carefully follow the instructions while attempting to flash a rom or you may earn yourself a brick.
Oh, since we're already mentioning Sony and bricks, shame on them for ending the support for Sony Update Service. Why they took away a program which successfuly saved my phone from Hard bricking and forced us to use that garbage called PC Companion which failed the same thing and is MUCH slower is still beyond me.
You can't even use SUS anymore. All you get is a message: "To update the software in your device, use PC Companion instead" which made me change my mind about having some Sony device as my new phone.

Ok, back to Xperia X8...
The camera, it sucks. It can't zoom, it doesn't have many options and the quality is nothing special. On the other hand, I liked it because it can record videos in 30 frames per second.
The screen doesn't support dual touch, which means it will be hard or impossible to use some apps properly. Most good custom roms can provide "Fake dual touch" which allows you to use "Pinch to zoom" which can be useful while browsing the internet, but it's not working perfectly like the real dual touch. At least the screen has a great scratch resistan protection.

The speakers are what you would expect from a phone, not too bad for the price. Earphones you get with the phone are horrible and the music player does not offer equalizer and it has very limited options, so I highly recommend a good 3rd party music player. Better earphones are also an option.

There are 6 hardware buttons on the device. I can use 4 of those in emulators such as Nesoid to make games playable due to the lack of multitouch. I kind of broke my "Back" button after pressing it too hard with reflexes to make Mario jump higher.xD And you're right, he never jumped any higher than usual.
The button is still working, but it kind of "sinked" into the phone a bit and now I must press it harder to work than other buttons next to it.

Overall, it's a really great phone for its time. Even today it's good for users who need a low end phone with basic requirements. The only complaint is that Sony blew a chance for making it a better phone by not releasin Froyo update.
For the price it was really worth it, especially after flashing a custom rom.
But don't expect it to match with even with today's low end phones with its old processor, low RAM and low internal storage.